Marker sources

Spot marker sources are intended to be held in place on the subject with adhesive tape to mark anatomically significant points or to orientate the scintigram.

Construction

The activity is adsorbed onto an organic ion exchange resin bead with a diameter of 1 mm and mounted at the centre of a transparent epoxy resin disc. The sources are available either as single sources in unshielded storage boxes or as sets of three sources of the same nuclide in a wooden storage box with lead shielding.

The Penpoint marker source is used for tracing the outlines of anatomical features on the patient.

Construction

The Co-57 activity is incorporated in a 1mm diameter bead, sealed inthe tip of an aluminium holder shaped like a pen. Each source is provided with a brass cap to shield the active end when the source is not in use.

Rigid marker sources can be used to outline or scale anatomical features during scintigraphy using gamma cameras and scanners. They are also useful for demonstration purposes.

Construction

The activity is sealed within a plastic matrix with 20 mm long active and inactive zones, which are mounted into a transparent plastic ruler. The active zones are coloured. The source is supplied in a wooden storage box.

Flexible marker sources can be used to outline or scale anatomical features during scintigraphy. They can be held in place with adhesive tape, if necessary.

Construction

Flexible marker sources can be supplied with the activity either uniformly dispersed in an inner core of active plastic and sealed in PVC tubing, or loaded in 20mm long active and inactive zones (scaling type). The inner diameter is approximately 0.9mm and the active length is 500mm. The inner tubing is mounted into a outer PVC-tubing (length approximately 550mm, 3mm diameter) and sealed with inactive plastic at the ends.